Electrolytic membrane structure for fuel cell and fuel cell

Details Electrolytic membrane structure for fuel cell and fuel cell Electrolytic membrane structure for fuel cell and fuel cell

H - Electricity

01

M

H01M 4/86 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2544620

A catalyst layer 2 is formed by conductive particles carrying catalyst particles 5, and a boundary layer is disposed adjacent to the catalyst layer 2 and is positioned between a portion which is easily contacted with an oxygen gas and the catalyst layer. The boundary layer 3 is formed by the conductive particles 4 carrying the catalyst particles 5 and a catalyst-carrying amount in the boundary layer 3 is smaller than a catalyst-carrying amount in the catalyst layer 2. Or a hydrophilic treatment is carried out to the conductive particles 4 of the boundary layer 3 by a hydrophilic material, while the conductive particles 4 in the boundary layer 3 do not carry the catalyst particles 5.

Selon le mode de réalisation décrit dans cette invention, une couche catalytique (2) est constituée de particules conductrices transportant des particules catalytiques (5), et une couche barrière est disposée de manière contiguë à la couche catalytique (2) et elle est disposée entre une partie qui entre facilement en contact avec un gaz oxygène et la couche catalytique. La couche barrière (3) est constituée de particules conductrices (4) transportant les particules catalytiques (5) et la teneur en catalyseur dans la couche barrière (3) est inférieure à la teneur en catalyseur dans la couche catalytique (2). Dans un mode de réalisation différent, un traitement hydrophile est réalisé sur les particules conductrices (4) de la couche barrière (3) au moyen d'un matériau hydrophile, alors que les particules conductrices (4) dans la couche barrière (3 ) ne transportent pas les particules catalytiques (5).

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